12 April 2011 Last updated at 13:10 ET
Shale gas ‘worse than coal’ for climate
By Richard Black Environment correspondent, BBC News
The new kid on the energy block, shale gas, may be worse in climate change terms than coal, a study concludes.
Drawn from rock through a controversial “fracking” process, some hail the gas as a “stepping stone” to a low-carbon future and a route to energy security.
But US researchers found that shale gas wells leak substantial amounts of methane, a potent greenhouse gas.